Bài 1 : Tìm x
x + 678 =2813
4529 + x = 7685
x - 358 = 4768
2495 - x = 698
x x 23 = 3082
36 x x = 27612
x : 42 = 938
4080 : x = 24
Bài 2 : Tìm x
a) x + 6734 = 3478 + 5782
b) 2054 + x = 4725 - 279
c) x - 3254 = 237 x 145
d) 124 - x = 44658 : 54
Bài 3 : Tìm x
a) x x 24 = 3027 + 2589
b) 42 x x = 24024 - 8274
c) x : 54 = 246 x 185
d) 134260 : x = 13230 : 54
Bài 4 : Tìm x
a) ( x + 268 ) x 137 = 48498
b) ( x + 327 ) : 125 = 348
c) ( x - 2048 ) : 145 = 246
d) ( 2043 - x ) x 84 = 13255
`x + 678 =2813`
`x=2813 - 678`
`x=2135`
____________________________
`4529 + x = 7685`
`x=7685 - 4529`
`x=3156`
__________________________________
`x - 358 = 4768`
`x=4768 + 358`
`x=5126`
______________________________
`2495 - x = 698`
`x=2495 - 698`
`x=1797`
___________________________________
`x xx 23 = 3082`
`x=3082 : 23`
`x=134`
__________________________________
`36 x xx = 27612`
`x=27612 : 36`
`x=767`
__________________________
`x : 42 = 938`
`x=938 xx 42`
`x=39396`
________________________
`4080 : x = 24`
`x=4080 : 24`
`x=170`
______________________________
`a) x + 6734 = 3478 + 5782`
`x + 6734 = 9260`
`x=9260-6734`
`x=2526`
_______________________________
`b) 2054 + x = 4725 - 279`
`2054 + x = 4446`
`x=4446 - 2054`
`x=2392`
_____________________________
`c) x - 3254 = 237 xx 145`
`x-3254 = 34365`
`x=34365+3254`
`x=37619`
_____________________________
`d) 124 - x = 44658 : 54`
`124-x = 827`
`x=124-827`
`x=-703`
_____________________________________
`#LeMichael`
`a) x xx 24 = 3027 + 2589`
`x xx 24 = 5616`
`x=5616 : 24`
`x=234`
____________________________
`b) 42 xx x = 24024 - 8274`
`42 xx x = 15750`
`x=15750:42`
`x=375`
______________________________
`c) x : 54 = 246 xx 185`
`x:54=45510`
`x=45510xx54`
`x=2457540`
________________________________
`d) 134260 : x = 13230 : 54`
`134260 : x =245`
`x=134260 : 245`
`x=548`
____________________________________
`a) ( x + 268 ) xx 137 = 48498`
`x + 268 = 48498 : 137`
`x + 268 = 354`
`x=354 - 268`
`x=86`
________________________________
`b) ( x + 327 ) : 125 = 348`
`x +327 = 348 xx 125`
`x + 327 = 43500`
`x=43500-327`
`x=43173`
_____________________________
`c) ( x - 2048 ) : 145 = 246`
`x-2048 = 246 xx 145`
`x-2048 = 35670`
`x=35670+2048`
`x=37718`
_____________________________
`d) ( 2043 - x ) xx 84 = 13255`
`2043 - x = 13255 : 84`
`2043 -x = 13255/84`
`x=2043-13455/84`
`x=158357/84`
_______________________________________
`#LeMichael`
Bài 3
\(x\times\text{24 = 3027 + 2589}\)
\(x\times24=\text{5616}\)
\(x=\text{5616}:24\)
\(x=\text{234}\)
\(--------------------\)
\(42\times x=24024-8274\)
\(42\times x=\text{15750 }\)
\(x=\text{15750 }:42\)
\(x=\text{375}\)
\(---------------------\)
\(\text{x : 54 = 246}\times185\)
\(x:54=\text{45510 }\)
\(x=\text{45510 }\times54\)
\(x=2457540\)
\(------------------------\)
\(\text{134260 : x = 13230 : 54}\)
\(134260:x=245\)
\(x=134260:245\)
\(x=548\)
